<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    * {
        margin: 0;
        padding: 0;
    }
    
    .box {
        position: relative;
        width: 100px;
        height: 80px;
        background-color: darkcyan;
        animation: test 5s 0s infinite;
    }
    
    @keyframes test {
        0% {
            transform: translate(0);
        }
        25% {
            transform: translateX(500px);
        }
        50% {
            transform: translateX(500px) translateY(500px);
        }
        75% {
            transform: translateX(0) translateY(500px);
        }
        100% {
            transform: translate(0);
        }
    }
</style>

<body>
    <div class="box">

    </div>
</body>

</html>